South Dennis

County:: Barnstable County
County Seat:: No
Area (mi²):: 4.55
State:: Massachusetts

South Dennis is a CDP located in Barnstable County, Massachusetts. South Dennis has a 2025 population of 2,966. South Dennis is currently declining at a rate of -1.49% annually but its population has increased by 2.45% since the most recent census, which recorded a population of 2,895 in 2020.

The average household income in South Dennis is $99,472 with a poverty rate of 4.52%.The median age in South Dennis is 55.2 years: 53.4 years for males, and 58.2 years for females.

Demographics

The racial composition of South Dennis includes 91.47% White, 3.98% Black or African American, 3.23% other race, and smaller percentages for Two or more races, Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	2,918	91.47%
Black or African American	127	3.98%
Other race	103	3.23%
Two or more races	25	0.78%
Asian	17	0.53%

South Dennis Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

South Dennis' average per capita income is $53,338. Household income levels show a median of $86,500. The poverty rate stands at 4.52%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$118,551	-
Families	$113,674	$121,907
Households	$86,500	$99,472
Non Families	$53,586	$64,228

$53,338

Average Income

$86,500

Median Household Income

4.52%

Poverty Rate